import QtQuick
import QtQuick.Controls

Window {
    id:root
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")
    property var posx:[-1,-1,-1];
    property var posy:[-1,-1,-1];
    property var gb:[l1,l2,l3];

    Rectangle
    {
        id:l1;
        width:20;
        height:20;
        radius:10;
        color:"red";
        visible:false;
        onXChanged:
        {
            var temp0=Math.random();
            var temp1=Math.random();
            var temp2=Math.random();
            var temp3=Math.random();
            color=Qt.rgba(temp0,temp1,temp2,temp3);
        }
        onYChanged:
        {
            var temp0=Math.random();
            var temp1=Math.random();
            var temp2=Math.random();
            var temp3=Math.random();
            color=Qt.rgba(temp0,temp1,temp2,temp3);
        }
    }

    Rectangle
    {
        id:l2;
        width:20;
        height:20;
        radius:10;
        color:"red";
        visible:false;
        onXChanged:
        {
            var temp0=Math.random();
            var temp1=Math.random();
            var temp2=Math.random();
            var temp3=Math.random();
            color=Qt.rgba(temp0,temp1,temp2,temp3);
        }
        onYChanged:
        {
            var temp0=Math.random();
            var temp1=Math.random();
            var temp2=Math.random();
            var temp3=Math.random();
            color=Qt.rgba(temp0,temp1,temp2,temp3);
        }
    }

    Rectangle
    {
        id:l3;
        width:20;
        height:20;
        radius:10;
        color:"red";
        visible:false;
        onXChanged:
        {
            var temp0=Math.random();
            var temp1=Math.random();
            var temp2=Math.random();
            var temp3=Math.random();
            color=Qt.rgba(temp0,temp1,temp2,temp3);
        }
        onYChanged:
        {
            var temp0=Math.random();
            var temp1=Math.random();
            var temp2=Math.random();
            var temp3=Math.random();
            color=Qt.rgba(temp0,temp1,temp2,temp3);
        }
    }


    Timer
    {
        id:spawn
        interval:1000;
        repeat:true;
        running:false;
        onTriggered:
        {
            var temp=Math.floor(Math.random()*4);
            for(var i=0;;++i)
            {
                if(i<temp)
                {
                    root.posx[i]=Math.floor(Math.random()*500);
                    root.posy[i]=Math.floor(Math.random()*300);
                    root.gb[i].x=root.posx[i];
                    root.gb[i].y=root.posy[i];
                    root.gb[i].visible=true;
                }
                else
                {
                    root.posx[i]=-1;
                    root.posy[i]=-1;
                    root.gb[i].visible=false;
                }
            }
        }
    }

    Button
    {
        x:100;
        y:300;
        width:20;
        height:20;
        onClicked:
        {
            if(spawn.running)
                spawn.stop();
            else
                spawn.start();
        }
    }
}